The computer simulation process is mainly determined by electrical time constant and electromechanical time constant. If frequency and pule width ratio of PWM are changed, the ripple of current, torque and so on are only influenced, when average value of armature circuit voltage is constant. This will causes vibration, noise and additional loss, but will not influence the basic characteristic of motor.
A nonlinear multi-input multi-output (MIMO)excitation and speed controller for separately excited DCmotors with field weakening is presented, which plays the role of the general excitation circuit regulator, the speed regulator and the current regulator in armature circuit. This controller takes field current, speed and armature current of the motor as state variables.
The computer simulation process is mainly determined by electrical time constant and electromechanical time constant. If frequency and pule width ratio of PWM are changed, the ripple of current, torque and so on are only influenced, when average value of armature circuit voltage is constant. This will causes vibration, noise and additional loss, but will not influence the basic characteristic of motor.
If the frequency and pulse width ratio of PWM are changed,the ripple of current,torque and so on are only influenced,when the average value of the armature circuit voltage is constant. This will cause vibration,noise and additional loss,but will not influence the basic characteristic of motor.
The monitor and control system makes use of PLC and the proved locomotive microcomputer control devices to perform respectively the switch logical control of system and the current closed loop control of the armature circuit, and it employs an industrial control microcomputer to carry out speed or characteristics control. DOS operating system is used in the control system in order to obtain fast control refresh rate A microcomputer with windows operating system provides a friendly interface to people.
A nonlinear multi-input multi-output (MIMO)excitation and speed controller for separately excited DCmotors with field weakening is presented, which plays the role of the general excitation circuit regulator, the speed regulator and the current regulator in armature circuit. This controller takes field current, speed and armature current of the motor as state variables.
Under the prerequisite of remaining motor and thyristor,Siemens 6RA70 system was used to carry out the reconstruction. The functions with the reversible magnetic field and the irreversible armature were remained,and the communication functions of the magnetic field circuit and the armature circuit were realized.
Then the model is applied to simulate the direct start-up process,the reduced voltage starting process and the starting process with series resistance in the armature circuit.
Then the model is applied to simulate the direct start-up process, the reduced voltage starting process and the starting process with series resistance in the armature circuit.
If the frequency and pulse width ratio of PWM are changed,the ripple of current,torque and so on are only influenced,when the average value of the armature circuit voltage is constant. This will cause vibration,noise and additional loss,but will not influence the basic characteristic of motor.
Under the prerequisite of remaining motor and thyristor,Siemens 6RA70 system was used to carry out the reconstruction. The functions with the reversible magnetic field and the irreversible armature were remained,and the communication functions of the magnetic field circuit and the armature circuit were realized.
Third, the acceleration feedback is added to suppress the vi bration of robotic manipulator caused by inductance of armature circuit. Finally, the computer simulation and ex periment results for PUMA562 are given to demonstrate the effectiveness of proposed control method.
Then the model is applied to simulate the direct start-up process,the reduced voltage starting process and the starting process with series resistance in the armature circuit.
Then the model is applied to simulate the direct start-up process, the reduced voltage starting process and the starting process with series resistance in the armature circuit.
In this article a synchrnous generator with three phase half-wave rectification output is simplified step by step, then the simpliest model is obtained. Using the model we can inde pendently solve the excitation circuit, armature circuit and load circuit.Under the treatment the conception of instantaneous state is introduced, and the every physical nature of the original system is retained. From the calculation the difference between the simple solution and the accurate one is within 8%. Therefore...
In this article a synchrnous generator with three phase half-wave rectification output is simplified step by step, then the simpliest model is obtained. Using the model we can inde pendently solve the excitation circuit, armature circuit and load circuit.Under the treatment the conception of instantaneous state is introduced, and the every physical nature of the original system is retained. From the calculation the difference between the simple solution and the accurate one is within 8%. Therefore this method can be used in engineering.In the digital simulation, we adopt the switch simulation technology. The offered program has better flexibility. It Can be convenientlv used in the analysis of the complete power system and the research of other rectification circuit, moreover it is applicable to dynamic state calculation of many situation.
This paper proposes the transient performances of synchronus generators and their control systems. The state equations of synchronus generators and their control systems under various transient conditons with consideraton of the resistances of all windings, the effect of damping windings, the transients in armature circuits as well as the unequal mutual inductances between different windings on the same rotor axis are developed. The computing methods and the flow charts are presented. The parameters of...
This paper proposes the transient performances of synchronus generators and their control systems. The state equations of synchronus generators and their control systems under various transient conditons with consideraton of the resistances of all windings, the effect of damping windings, the transients in armature circuits as well as the unequal mutual inductances between different windings on the same rotor axis are developed. The computing methods and the flow charts are presented. The parameters of a 300 MW turbo-generator set are used as an example to illustrate the use of this mthod. The results obtained show that the state space method is a very powerful method for the analyses of transient performances of synchronous generator set with its outstanding advantages of simplicity, accuracy, convenience and flexibility. It is also useful for the design and operation of electric machines and power systems.
This paper describes a new method of static demagnetization of synchronous machines, its scheme, principle, numerical and experim-ental results. In case of an accidental fault in the interior of a synchronous machine, it is not necessary to disconnect the rotor winding with the exciter circuit, we may insert an oscillation resist-ance in the armature circuit of the exciter, as shown in Fig, 1, After insertion, all field currents and voltages of the system will start oscil-lating and will vanish after a...
This paper describes a new method of static demagnetization of synchronous machines, its scheme, principle, numerical and experim-ental results. In case of an accidental fault in the interior of a synchronous machine, it is not necessary to disconnect the rotor winding with the exciter circuit, we may insert an oscillation resist-ance in the armature circuit of the exciter, as shown in Fig, 1, After insertion, all field currents and voltages of the system will start oscil-lating and will vanish after a short time.
armature circuit
电枢电流
查询“armature circuit”译词为其他词的双语例句
查询“armature circuit”译词为用户自定义的双语例句
相关查询
2008 CNKI－中国知网